6 Monitoring and Verification
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Marine Environment Protection Committee - MEPC.1/Circular.684 – Guidelines for Voluntary Use of the Ship Energy Efficiency Operational Indicator (EEOI) – (17 August 2009) - Annex – Guidelines for Voluntary Use of the Ship Efficiency Operational Indicator (EEOI) - Annex – Guidelines for Voluntary Use of the Ship Energy Efficiency Operational Indicator (EEOI) - 6 Monitoring and Verification

6 Monitoring and Verification

6.1 General

 Documented procedures to monitor and measure, on a regular basis, should be developed and maintained. Elements to be considered when establishing procedures for monitoring could include:

    • identification of operations/activities with impact on the performance;
    • identification of data sources and measurements that are necessary, and specification of the format;
    • identification of frequency and personnel performing measurements; and
    • maintenance of quality control procedures for verification procedures.

 The results of this type of self-assessment could be reviewed and used as indicators of the System’s success and reliability, as well as identifying those areas in need of corrective action or improvement.

It is important that the source of figures established are properly recorded, the basis on which figures have been calculated and any decisions on difficult or grey areas of data. This will provide assistance on areas for improvement and be helpful for any later analysis.

In order to avoid unnecessary administrative burdens on ships’ staff, it is recommended that monitoring of an EEOI should be carried out by shore staff, utilizing data obtained from existing required records such as the official and engineering log-books and oil record books, etc. The necessary data could be obtained during internal audits under the ISM Code, routine visits by superintendents, etc.

6.2 Rolling average indicator

 As a ship energy efficiency management tool, the rolling average indicator, when used, should be calculated by use of a methodology whereby the minimum period of time or a number of voyages that is statistically relevant is used as appropriate. “Statistically relevant” means that the period set as standard for each individual ship should remain constant and be wide enough so the accumulated data mass reflects a reasonable mean value for operation of the ship in question over the selected period.


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